Remove Glance cache

Our default backend is RBD, using the 'keystone+cachemanagement' is
extremely dangerous since it will result in images getting cached in the
controllers under /var/lib/glance/image-cache/ and will potentially lead to
a full system sooner or later. Moreover since we use RBD CoW clone there
is no point to cache anything. Everytime a virtual machine is booted
often, this image will go into the cache. Think about Windows 50GB big
images, now think about 10 of them :D.

Going further if we have to use another backend I won't recommend using
it. I only Swift as a suitable backend for this, but regarding some
recent effort on the Nova side (image direct url) to get the image
directly from the storage entity I don't think it's useful to have any
images cached anyways.

Signed-off-by: Sébastien Han <sebastien.han@enovance.com>

manifests/image/api.pp

@@ -83,6 +83,11 @@
 #   Example: 'nfsvers=3,noacl'
 #   Defaults to 'defaults'
 #
+# [*pipeline*]
+#   (optional) Partial name of a pipeline in your paste configuration file with the
+#   service name removed.
+#   Defaults to 'keystone'.
+#
 class cloud::image::api(
   $glance_db_host                    = '127.0.0.1',
   $glance_db_user                    = 'glance',
@@ -108,6 +113,7 @@ class cloud::image::api(
   $filesystem_store_datadir          = undef,
   $nfs_device                        = false,
   $nfs_options                       = 'defaults',
+  $pipeline                          = 'keystone',
 ) {
 
   # Disable twice logging if syslog is enabled
@@ -150,6 +156,7 @@ class cloud::image::api(
     bind_host                => $api_eth,
     bind_port                => $ks_glance_api_internal_port,
     use_syslog               => $use_syslog,
+    pipeline                 => 'keystone',
   }
 
   # TODO(EmilienM) Disabled for now

spec/classes/cloud_image_api_spec.rb

@@ -64,6 +64,7 @@ describe 'cloud::image::api' do
         :bind_host                => '10.0.0.1',
         :bind_port                => '9292',
         :use_syslog               => true,
+        :pipeline                 => 'keystone',
         :log_dir                  => false,
         :log_file                 => false
       )